Well, for starters, more than half of that "life" doesn't even have thumbs, so even if that life were sentient beyond eat/fuck/kill, it couldn't pick up rocks or anything. I would say the majority of "life" on this planet is dumpster life, evolutionary mishaps that haven't yet been culled. There are more interesting animals out there, elephants, dolphins, etc., but again, thumbs.

It's incredible to me how dismissive you are of life itself given what an incredibly, unfathomably tiny percentage of matter can be classified as alive.

I agree, but most people couldn't care less about that. Most people eat meat, use housing that's displaced huge amounts of land that animals use to inhabit, etc.

Is it still on that floating rock when there's nobody to see it?

"If a tree falls in a forest"